Dev tools · alternatives · 2026

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Webassembly.sh – WebAssembly WASI Terminal on your Browser launched in 2019; newer entries below may have overtaken it.

1. 1
   I built a WASI playground for running CLI binaries in the browser▲115

   Run WebAssembly made for outside the browser, inside the browser.

   2022 · runno.dev · its alternatives →

2. 2
   Firefox in WebAssembly▲273

   This is the entire Firefox browser rendering to a element. Gecko, all UI components, and the Spidermonkey JS engine are all compiled and running in WebAssembly. Here are a few things you might find interesting: - This is fully end to end encrypted! We use the WISP protocol for TCP-over-websockets. - There is a novel WASM->JS JIT for experimental site speedup - This port cost over 25k in opus/fable tokens for debugging and JIT research This was just a fun experiment to push the boundaries of WebAssembly. For a more usable "browser in browser" experience, we also built…

   Jul 2026 · developer.puter.com · its alternatives →

3. 3
   I wrote a WebAssembly Interpreter and Toolkit in C▲105

   Web49: WebAssembly Interpeter. Contribute to FastVM/Web49 development by creating an account on GitHub.

   2023 · github.com · its alternatives →

4. 4
   Wasmer – A Go library for executing WebAssembly binaries▲44

   🐹🕸️ WebAssembly runtime for Go. Contribute to wasmerio/wasmer-go development by creating an account on GitHub.

   2019 · github.com · its alternatives →

5. 5
   Compiling C in the browser using WebAssembly▲174

   We’ve reached a major milestone in making any software run with WebAssembly. Thanks to the newest release of Wasmer (4.4) and the Wasmer JS SDK (0.8.0) ...

   2024 · wasmer.io · its alternatives →

6. 6
   WebAssembly System Interface for Deno has been merged into Deno▲48

   2020 · deno.land · its alternatives →

7. 7
   WebAssembly▲86

   New binary format for compiling applications for the web

   2015 · github.com · its alternatives →

8. 8
   Create Native Desktop Apps from WebAssembly▲47

   In the [first article in this series](<https://wasmer.io/posts/wasm-as-universal-binary-format-part-1-native-executables>) we demonstrated how you can c...

   2022 · wasmer.io · its alternatives →

9. 9
   Docker in the browser using x86-to-WASM recompilation▲119

   Run KolibriOS, Linux or Windows 98 in your browser

   2022 · copy.sh · its alternatives →

10. 10
    A WebAssembly System Interface Implementation for Deno▲90

    A (WIP) WebAssembly System Interface implementation for Deno - caspervonb/deno-wasi

    2020 · github.com · its alternatives →

11. 11
    Sandboxing untrusted code using WebAssembly▲76

    Hi everyone, I built a runtime to isolate untrusted code using wasm sandboxes. Basically, it protects your host system from problems that untrusted code can cause. We’ve had a great discussion about sandboxing in Python lately that elaborates a bit more on the problem [1]. In TypeScript, wasm integration is even more natural thanks to the close proximity between both ecosystems. The core is built in Rust. On top of that, I use WASI 0.2 via wasmtime and the component model, along with custom SDKs that keep things as idiomatic as possible. For example, in Python we have a simple decorator:…

    Feb 2026 · github.com · its alternatives →

12. 12IW
    I wrote a book about WebAssembly▲410

    Hey HN! I've been working on a book about WebAssembly over the last few months, and it's finally available at http:&#x2F;&#x2F;levelupwasm.com! Why a book on WebAssembly you ask? Well... WebAssembly is awesome (obviously ) but it's certainly not the easiest thing to learn. So I wrote this book as a practical intro to using WebAssembly in your web apps. I would appreciate any feedback!

    2019 · its alternatives →

13. 13AW
    A WebAssembly game demo▲251

    2017 · funkykarts.rocks · its alternatives →

14. 14
    WAPM – WebAssembly Package Manager▲186

    Hi HN! I’m Syrus, from the Wasmer team. We just released the new version of WAPM that is an order of magnitude better than the previous one (that we also announced here in HN two years ago! [0]), enabling an incredible experience for using and publishing WebAssembly packages. The tech stack that we are using includes: * Python and Django (for the backend) with Graphene (for the open GraphQL API [1]) and Django Channels with websockets over GraphQL [2] for subscriptions * Next.js [3] with React-Relay [4] and Tailwind.css [5] for the frontend * WebAssembly and Wasmer [6] (for the online shell)…

    2022 · wapm.io · its alternatives →

15. 15
    Wrote a tiny WebAssembly (wat2wasm) compiler in Go▲75

    As a personal project I wrote a really tiny Wat 2 Wasm compiler in Go. Mainly for demonstrative and educational purposes. It was tough: I didn't know anything about WebAssembly internals and I'm a newbie with Go... so I tried to document it as much as I could for anyone that would like to approach the quest in the future! It misses a lot of features (that will be gradually implemented). Any feedback is welcomed!! Demo: https:&#x2F;&#x2F;luna-demo.vercel.app

    2022 · github.com · its alternatives →

16. 16
    I built a WASM-console using WebAssembly and tinygo▲18

    a very (x 10) basic wasm console. Contribute to rajatjindal/wasm-console development by creating an account on GitHub.

    2024 · github.com · its alternatives →

17. 17WW
    Wasmino = WASM and Arduino – Running Arduino Code in Browser▲84

    2020 · blog.yifangu.com · its alternatives →

18. 18VO
    Vim online editor using WebAssembly, storing files using IndexedDB▲316

    2023 · vimonlineeditor.com · its alternatives →

19. 19
    WebAssembly System Interface (WASI) with Sockets for Go▲9

    Go v1.21, scheduled for release in August 2023, adds experimental support for the WebAssembly System Interface (WASI). It'll be possible to natively compile server-side WebAssembly applications with Go, making Go a first-class citizen along with C&#x2F;C++, Rust and Zig. GOOS=wasip1 GOARCH=wasm go build ... WASI is still in preview and is missing some key features, e.g. the ability to create sockets. Some WebAssembly runtimes have taken the initiative to extend the WASI preview, enabling a wider range of applications to run as WebAssembly modules. Today, we're open sourcing our WASI library…

    2023 · github.com · its alternatives →

20. 20
    Run Python, Ruby, Node.js, C++, Lua in the Browser via x86 to WASM JIT▲171

    Linux virtual machine, running in the browser via HTML5/WebAssembly. Networking and graphics supported.

    2021 · repl.leaningtech.com · its alternatives →

21. 21
    Run WASM in Containerd▲77

    I've been working with a partner team to integrate wasm workloads with existing container toolchains with the goal of enabling wasm workloads anywhere, be it on the edge, in kubernetes, or wherever. To that end, this project implements a containerd shim which runs those wasm workloads. It is designed as a library to bring your own host implementation, but also includes an implementation for WASI. Right now the library assumes you are using wasmtime, which is embedded in. It works either standalone (run with containerd directly) or in kubernetes. Kubernetes networking and storage are wired…

    2022 · github.com · its alternatives →

22. 22
    Execute JavaScript in a WebAssembly QuickJS sandbox▲206

    This TypeScript package allows you to safely execute JavaScript code within a WebAssembly sandbox using the QuickJS engine. Perfect for isolating and running untrusted code securely, it leverages the lightweight and fast QuickJS engine compiled to WebAssembly, providing a robust environment for code execution. Features - *Security*: Run untrusted JavaScript code in a safe, isolated environment. - *File System*: Can mount a virtual file system - *Custom Node Modules*: Custom node modules are mountable - *Fetch Client*: Can provide a fetch client to make http(s) calls - *Test-Runner*: Includes…

    2024 · github.com · its alternatives →

23. 23
    Does your browser supports WebAssembly?▲11

    Does your browser support WebAssembly? Check WebAssembly support and features like SIMD, threads and more.

    2020 · wasm.joway.io · its alternatives →

24. 24
    WebAssembly runtime embedded in Godot game engine▲32

    A WebAssembly runtime embedded in Godot game engine projects. Interact with Wasm modules from GDScript. Accessing Wasm modules via GDScript provides the following benefits. - Sandboxed environment allows safely loading zero-trust mods&#x2F;extensions to a project. - Single target means that Wasm modules can be built from any language e.g. Rust, Go, AssemblyScript and the single binary can be run on all platforms. - Fast execution compared to GDScript allows for offloading compute-heavy operations or running bots&#x2F;mods&#x2F;etc. at high FPS. This might be useful for loading mods, bot AI,…

    2023 · github.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →